docs: document matchExpressions field for post-selectors (#13646)

Signed-off-by: Michael Crenshaw <350466+crenshaw-dev@users.noreply.github.com>
argoproj · Jun 2, 2023 · c8e44ed · c8e44ed
1 parent fd5f3c4
commit c8e44ed
Showing 1 changed file with 17 additions and 1 deletion.
diff --git a/docs/operator-manual/applicationset/Generators-Post-Selector.md b/docs/operator-manual/applicationset/Generators-Post-Selector.md
@@ -36,8 +36,24 @@ spec:
 ```
 
 The List generator + Post Selector generates a single set of parameters:
+
 ```yaml
 - cluster: engineering-dev
   url: https://kubernetes.default.svc
   env: staging
-```
+```
+
+It is also possible to use `matchExpressions` for more powerful selectors.
+
+```yaml
+spec:
+  generators:
+    - clusters: {}
+      selector:
+        matchExpressions:
+          - key: server
+            operator: In
+            values:
+              - https://kubernetes.default.svc
+              - https://some-other-cluster
+```